$200 billion tax cut with MPC 0.8 increases AD by up to:

While maximum output may be a goal for an economy, equilibrium does not necessarily mean that output is at its highest possible level. An economy can be in equilibrium at various output levels, depending on consumer demand and resource availability, thus output being maximized is not a defining characteristic of equilibrium.

This statement accurately reflects the condition for equilibrium in an economy. When aggregate demand equals aggregate supply, it signifies that the quantity of goods and services that consumers are willing to purchase matches what producers are willing to sell. This balance prevents either surplus or shortage in the market, establishing a state of equilibrium.

Equilibrium does not imply that unemployment is zero. An economy can be in equilibrium with some level of unemployment due to factors like frictional or structural unemployment. Therefore, while full employment is often sought, it does not equate to the state of equilibrium in the economy.